Since you will be going with a dryloop & voip... it may depend if you are getting a new phone # or getting a new one.
If getting a new one, cancel your services, find out what your cancellation date is & get a dryloop service for the day the service gets cancelled.
If you keep the phone #, don't cancel phone so that you don't have issues proting the #. But DSL may have to be cancelled on the day the porting is to happen. Once you have the date of the cancellation of your DSL, place the dryloop on that date.
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